21009208

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{1237}}^1$

素因数の和:1447

約数の個数: 32

約数和(自身を含む): 43230960

約数和(自身を除く): 22221752

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 193, 386, 772, 1237, 1544, 2123, 2474, 4246, 4948, 8492, 9896, 13607, 16984, 27214, 54428, 108856, 238741, 477482, 954964, 1909928, 2626151, 5252302, 10504604, 21009208]

約数ペア:

[(1, 21009208), (2, 10504604), (4, 5252302), (8, 2626151), (11, 1909928), (22, 954964), (44, 477482), (88, 238741), (193, 108856), (386, 54428), (772, 27214), (1237, 16984), (1544, 13607), (2123, 9896), (2474, 8492), (4246, 4948)]